64894173 has 4 divisors (see below), whose sum is σ = 86525568. Its totient is φ = 43262780.

The previous prime is 64894121. The next prime is 64894187. The reversal of 64894173 is 37149846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64894173 - 2¹⁴ = 64877789 is a prime.

It is a super-2 number, since 2×64894173² = 8422507378707858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64894273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10815693 + ... + 10815698.

It is an arithmetic number, because the mean of its divisors is an integer number (21631392).

Almost surely, 2^64894173 is an apocalyptic number.

It is an amenable number.

64894173 is a deficient number, since it is larger than the sum of its proper divisors (21631395).

64894173 is a wasteful number, since it uses less digits than its factorization.

64894173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21631394.

The product of its digits is 145152, while the sum is 42.

The square root of 64894173 is about 8055.6919628298. The cubic root of 64894173 is about 401.8542515129.

The spelling of 64894173 in words is "sixty-four million, eight hundred ninety-four thousand, one hundred seventy-three".